Hi, I bought this cross on eBay and havent been able to find this hallmark, thought it may have been St. Petersburg Russia hallmark but its different. https://ibb.co/4F4WXF5 https://ibb.co/jkZKxPt https://i.ibb.co/sgsjNgM/20190727-172830.jpg aluminum uses https://i.ibb.co/8g43RLk/Resized-20190727-13...